1982 Johnson 150 bearings

[Thompy_04]

Hey guys I've got a 79 150 that broke a ring on #1 so it's trash however I was given an 82 150 but its locked up. I've had the heads off and see no rust but if the bearings have rust can I snag the bearings out of the blown motor to build a Franken-motor of sorts? The motor is locked up from sitting as I've checked compression and heard it run but this was 10 years ago. Would love to keep the cost down putting two motor together to get a good runner.

 

[emdsapmgr]

Re: 1982 Johnson 150 bearings

The cranks in both engines are the same part number, as are the rods (and pistons.) The crank bearings are the same part number. The rod bearings are a different part number, but they will also swap. The factory engineers changed them slightly, but their fit and function is basically the same. Just make sure the bearings you plan to use do not have any blue coloring, indicating that they were overheated.

 

[Thompy_04]

Re: 1982 Johnson 150 bearings

Real quick question. I got the locked up motor unstuck and turns freely as it should, however every revolution or two there is an audiable "click" from the number 6 hole. It sounds like a ring is stuck or something because it clicks when that piston goes by the intake and exhaust ports. In insight would be great if this is fimilar to you in any way.

 

[emdsapmgr]

Re: 1982 Johnson 150 bearings

It would be a broken ring, contacting one of the ports. You'd need to look at both sides of the piston to know for sure. You can look through the exhaust ports by removing the exhaust manifolds. You can remove the bypass cover to see the intake side of the piston. Also, there is normally a lot of slop in the piston to cyl walls on this engine. You can actually move the piston somewhat by hand inside the cyl. Shine a light at the piston/liner crack, looking for the shiny top piston ring. You should be able to slightly move the piston around to see if the top ring is completely intact (continuous/whole) or not. Also, you should move the piston far enough to see if the piston retainer ring is still in place at both ends of the piston pin. If you don't find anything, you may have to remove that piston to check the needle and crank bearings. If the needle bearings are blue in color, they've been overheated and are scrap. Check for flat spots on them. (rust and pitting.)

 

[Thompy_04]

Re: 1982 Johnson 150 bearings

I've noticed the play, there's more than I thought. Thanks for the replies I'm on the right track. And a my manual doesn't hurt either!

 

[Thompy_04]

Re: 1982 Johnson 150 bearings

Progress update. Got the crankcase split today, the lower main was severely rusted up and had broke a crank seal ring everything else looked surprisingly great! Gonna do a crank, lower, and upper main bearing transplant this weekend with the help of my father for a little father/son time on Sunday. One question though and I hope this doesn't ruin my day... I noticed where the crank seal ring seats right in front of the lower crank balancer had a small crack and had bent just a bit. Is the block trash now? Ill post a photo when I get off work.

 

[emdsapmgr]

Re: 1982 Johnson 150 bearings

Rust in the engine may have come from water in the fuel. If it sat for a period of time (over the winter) without proper winterization, the residual water/moisture will rust whatever it comes in contact with.